Abstract The caterpillar Spodoptera frugiperda is a pest of great economic importance for cultivated maize (Zea mays) found in countries with higher yields and exports of this crop. Synthetic insecticides widely used in the control of this insect pest has been promoting its resistance and environmental contamination. Thus the essential oils become promising in the use for the management of this pest. Essential oils from fresh leaves of Piper corcovadensis, Piper marginatum and Piper arboreum were obtained by hydrodistillation in a Clevenger type apparatus and 38, 36 and 49 compounds were respectively identified by gas chromatography/mass spectrometry (GC/MS). In the topical contact tests against Spodoptera frugiperda, LD50 levels ranging from 3.58 to 10.91 mg/g were found, showing that the essential oils of P. corcovadensis and P. marginatum obtained the lowest LD50. In addition to toxicity, the oils of these species of Piper have been shown to be relevant in the quantitative influence of essential proteins, lipids, carbohydrates and glycogen present in this pest. This research constitutes the first report of toxic activity associated with nutritional parameters to the essential oils of leaves of P. corcovadensis, P. marginatum and P. arboreum.

中文翻译：

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胡椒属植物叶子精油的毒性对草地贪夜蛾（JE Smith）（鳞翅目：夜蛾科）营养参数的影响

摘要 Spodoptera frugiperda 毛虫是一种对栽培玉米（Zea mays）具有重要经济意义的害虫，在该作物产量和出口量较高的国家发现。广泛用于控制这种害虫的合成杀虫剂一直在促进其抵抗力和环境污染。因此，精油在用于管理这种害虫方面变得很有希望。在 Clevenger 型装置中通过水力蒸馏获得胡椒、Piper marginatum 和 Piper arboreum 新鲜叶子的精油，并通过气相色谱/质谱法 (GC/MS) 分别鉴定出 38、36 和 49 种化合物。在针对草地夜蛾的局部接触试验中，发现 LD50 水平为 3.58 至 10.91 mg/g，表明 P. corcovadensis 和 P. marginatum 获得最低的 LD50。除了毒性之外，这些胡椒属植物的油已被证明与这种害虫中存在的必需蛋白质、脂类、碳水化合物和糖原的数量影响有关。该研究首次报告了与 P. corcovadensis、P. marginatum 和 P. arboreum 叶子精油的营养参数相关的毒性活动。